Photographic-printing machine.



No. 760,838. PATENTED MAY 24, 1904. D. ARGERBRIGHT. PHOTOGRAPHIG PRINTING MACHINE.

APPLICATION FILED JAN. 2. 1904.

vN0 MODEL.

Patented May 24, 1 904.

UNITED STATES PATENT OFFICE.

DANIEL ARGERBRIGHT, OF TROY, OHIO.

PHOTOGRAPHlC-PRINTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 760,838, dated May 24, 1904.

Application filed January 2, 1904:. Serial No. 187,468. (No model.)

To (oZZ whom, it TTI/CI/y concern:

Be it known that I, DANIEL ARGERBRIGHT, a citizen of the United States, residing at Troy, in the county of Miami and State of Ohio, have invented certain new and useful Improvements in Photographic-Printing Machines, of which the following is a specification.

My invention relates to a machine for taking photographic prints from negatives.

My object is to construct a machine which will insure the proper timing of the printing operation for each negative, which will enable me to place the paper properly in position for printing, it being understood that the size of the prints and the negatives are not always the same.

A further object is to construct the machine so that the operator can determine in advance the proper period of time for printing from each negative, and the timing mechanism will then indicate when this predetermined period has elapsed.

A further object is to arrange the parts so that the intensity of the light thrown upon different parts of the negative can be varied for the purpose of printing more on one side that the other of the printing-paper.

In the drawings, Figure 1 is a perspective View of a desk or stand containing the mechanism embodying my invention. Fig. 2 is a perspective view showing the lid of the desk in elevated position. Fig. 3 is a transverse sectional view through the desk and mechanism. Fig. 4 is a detail view of the switch for the clock mechanism. Fig. 5 shows a modified form of support for the frame a.

In the several views like parts are indicated by similar characters of reference.

The desk or stand is indicated by A. VVithin this stand there is formed a central opening, (indicated by 13,) and within this central opening there is placed an adjustable tilting frame a. I have shown within this frame five electric lights or five bulbs for electric lights. The central bulb is of'a non-actinic color, a yellow bulb being preferably employed. This colored bulb is indicated by the letter a and the other bulbs by the letter a.

, in its adjusted position.

Said frame is shown with a semicircular plate, (marked a The frame a is pivoted on the standard a, as shown in Fig. 3, and can be tilted in its position and held in proper ad justment by a thumb-screw a, or the frame may be provided with trunnions a, as in Fig. 5. These trunnions a bear in sockets a on the side of the case A, and thumb-screws a are provided in said sockets to hold the frame In Fig. 3 I have shown the frame in dotted lines tilted for providing for variations in printing from the negative, assuming that it is found to be desirable to have more light thrown upon the lower or upper part of the negative in order to bring out that part equally well with other parts of the negative. These electric bulbs. giving what is known as actinic light, are connected by electric wires (0. The wires from the four bulbs at the ends of the frame are connected to a terminal (0 Fig. 1, while the electric wires from the colored bulb a are connected with a terminal a. The ordinary electric-lighting current is connected in the ordinary way with a terminal a. A switch a (shown in Fig. 1) is formed with a stop a, which when the switch is thrown into the .position shown in Fig. 1 arrests the clock mechanism hereinafter mentioned. shown four white electric bulbs; but more or.

I have less may be used.

The clock mechanism consists of gears b, which are wound up in the usual manner and operate a hammer I). There is a bell shown in Fig. 3, (marked 6 The stop a is thrown by the switch a into the path of movement; of a flutter-wheel 6 so that the, stop a willl arrest the flutter-wheel b and thereby stop the clock mechanism. The construction is such that when the switch a is thrown into its upper position, as shown in Fig. 1, the timing mechanism will be arrested and the colored light, known as non-actinic light, thrown on the negative; but when the switch is thrown to its lowermost position the flutter-wheel b will be released and the clock mechanism will cause the hammer b to strike the bell 6 and simul-v taneously the other bulbs a will be lighted for the purpose of printing.

I have shown in Figs. 1 and 2 the lid of the stand, (indicated by 71",) and this lid is formed with a central opening, over which is placed a ground plate 7;. There are sliding plates l), Fig. 1, which are adjustable by thumb-screws 6 The negative 6 is placed on the glass 6 and adjusted and held in proper position by the sliding plates 6. The printing-paper is then placed over the negative in the proper position and the cover L" lowered until the platen L securely holds the print against the negative, as shown in Fig. 3.

The operation of my machine is as follows: hen it is desired to print from a negative as to which the operator is uncertain as to the proper period of time during which the negative should be exposed to the printing operation, he tests the negative by placing it upon the ground-glass plate 7i, then places the printingpaper upon the negative, and then lowering the lid 7) he throws the switch a from its normal or upper position to its lower position, thereby releasing the clockwork mechanism and simultaneously lighting the electric bulbs 66 and shutting elf the colored light a. He then determines by examination and experiment the proper interval of time for printing the particular negative at hand. This interval of time is indicated by the number of strokes of the bell. He can then note upon the negative itself the period of time or number of strokes of the bell required for proper printing. Thereafter he simply holds the subsequent prints exposed to the electric lights during the proper interval of time, predetermined by the method hereinbefore described. The purpose of the colored light is to illuminate the negative to enable the operator to place the paper properly thereon and at the same time provide a light that will not alfect the sensitized paper.

To provide for vignetting and what is technically known as dodging,Ihave provided on the under side of the lid 6 ahinged frame 0 and suitable fastening means therefor, which in the drawings have been shown as buttons 0. Vignetting and dodging is usually done by placing paper of varying degrees of transparency between the negative and printinglight. In the device shown this paper may be either attached to the frame 0 or held in position by clampingbetween said frame 0 and the lid Z).

Having thus described my invention, I claim 1. In a photographic-printing machine, the combination of electric lights with clock mechanism, including a bell and hammer, a switch for throwing on and oil the electric lights, and stop mechanism connected with said switch for releasing the clock mechanism simultaneously with the throwing of the electric switch, for the purpose specified.

2. In a photographie-printing machine, a stand, means for supporting a frame within said stand, electric-light bulbs supported with in said stand, and an additional colored bulb also supported within said stand, a switch normally adapted to connect the colored electric bulb and further adapted to disconnect same by its operation to connect the other electriclight bulbs, for the purpose specified.

3. In a photographicprinting machine, electric bulbs including a colored bulb, a switch normally connecting the electric current with the colored bulb, clock mechanism, and a stop connected to said switch for arresting the clock mechanism during the time the current is connected with the colored bulb, means for releasing said stop mechanism and thereby simultaneously causing the electric current to be connected with the other electric bulbs and starting the clock mechanism, for the purpose speeilied.

4. In a photographic-printing machine, the combination of a support, a swinging frame located within said support, electric bulbs supported within said frame, and means for mov ing said frame about its pivotal points and holding same in its proper adjusted position, for the purpose specified.

5. The combination of a support and a pivoted frame, electric bulbs supported within said frame and means for raising one or more of said bulbs and simultaneously lowering other bulbs located within said frame and for holding same in proper position, whereby one side of the negative may be printed stronger than the other.

6. .In a photographic-printing device, the combination with a negativesupport, a tympan and an actinic artificial light, of a pivoted light-supporting frame, whereby the light may be variably distributed upon said negative.

7. In a photographic-printing device, the combination of a casing, a negative-support, a tyinpan, a pivoted light-supporting member within said casing and means for adjusting said light-supporting member in its relation to said negative, whereby the light will be unevenly distributed thereon.

S. In a photographic-printing device, the combination with negative-supporting means, actinic and non-actinic lights, of timing mechanism, and a switch normally engaging with said timing mechanism and connecting said non-actinic light and adapted when in operative position to release said timing mechanism and connect said actinic light, substantially as specified.

9. In a photographic-printing device, the combination with negative and paper holding means, of a plurality of actinic lights, and means for varying the respective actinic lights in their relation to the negative, whereby the intensity of light on various portions of the negative may be varied.

10. In a piiotograpllic-printii'ig device, the combination with negative and paper holding means, of an adjustable light-support, Wherecombination of a support, a swinging frame by the light may be unevenly distributed on located in said support, aotinic lights supportsaid negative, substantially as specified. ed in said frame, and pivotal supports for said 11. Ina photographie-printing device as deframe, substantially as and for the purpose I5 5 scribed, the combination With negative and specified.

paper holding means, alight-supporting mem- In testimony whereof I have hereunto set her, of a hinged support for dodging means my hand this 21st day of December, A. D. 1903. interposed between said negative holding DANIEL 'ARGERBRIGHT. means and light-supporting member, substan- Witnesses: tially as specified. (J. N. BURNS,

12. In aphotographic-printingmachine,the L. A. ZIEGENFELDER. 

